Question

the velocity of a moving body changes at a constant rate from 50 M per second to 20 m per second in 3 seconds find acceleration

Answer 1

   hiii friend                                                    
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 initaial velocity of car(u)=50 m/s
                   
Final velocity of car(V)=20 m/s
                   
Time(t)=3sec
                   
Accleration[a]=?


We know that accleration=  (v-u)/t

                                        => ( 20-50)/3
                                                 
            
                                     =      ( -30)/3
                                                 

                                          => -10 m/s²

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Answer 2

ur answer...
acceleration is equal to change in vel. / time
by using above formula u can solve it